Many of us have heard of permanent magnets and even used them. But when asked what permanent magnets are, what types of permanent magnets are there, and what applications are there for permanent magnets, few people can answer. Therefore, in today’s article, we will try to answer these questions one by one.
Was sind Dauermagnete?
First, let’s understand what permanent magnets are.
Magnets that can maintain magnetism for a long time are called permanent magnets, such as natural magnets (magnetite), artificial magnets, etc.
Permanent magnets are not easily demagnetized or magnetized, and their polarity will not change. However, if a permanent magnet is heated above the Curie temperature or is in an environment with a high reverse magnetic field strength, its magnetism will also weaken or disappear.
Some permanent magnets are brittle and may break at high temperatures. For example, the maximum operating temperature of AlNiCo magnets exceeds 540°C (1,000°F), the maximum operating temperature of SmCo magnets and ferrites is about 300°C (570°F), and the maximum operating temperature of Nd magnets and soft magnets is about 140°C (280°F).
How many types of permanent magnets are there?
The first type of permanent magnets are alloy permanent magnet materials, including rare earth permanent magnet materials such as Nd2Fe14B, SmCo, and AlNiCo.
The second type of permanent magnets are ferrite permanent magnet materials. According to different production processes, ferrite permanent magnet materials can be divided into sintered ferrite, bonded ferrite, and injection molded ferrite.
In addition, Cu-Ni-Fe, Fe-Co-Mo, Fe-Co-V, MnBi, and AlMnC alloys have also been used as permanent magnet materials in history. However, these alloys are rarely used in most applications due to their poor performance and high cost.
Related reading: Types and uses of permanent magnets
What are the applications of permanent magnets?
Permanent magnets have a wide range of applications. For example, they can be found in TVs, speakers, radios, leather bag buckles, data cable magnetic rings, computer hard drives, mobile phone vibrators, etc. In short, permanent magnets are everywhere in people’s lives and facilitate our production and life.
Schlussfolgerung
Thank you for reading our article, and I hope it will help you better understand what permanent magnets are, their types and applications.
If you want to know more about permanent magnets, we recommend that you visit the Stanford Magnet website for more information. As a leading global magnet supplier, Stanford Magnet has been committed to the research and development, manufacturing and sales of permanent magnets since the 1990s, providing customers with high-quality rare earth permanent magnet products such as neodymium magnets and other non-rare earth permanent magnets.
